Charge transport in electron-doped cuprates

Within the t-t'-J model, the charge transport in electron-doped cuprates is studied. The conductivity spectrum is characterized by a low-energy peak and unusual midinfrared band, while the resistivity exhibits a crossover from the high temperature metallic-like to low temperature insulating-like behavior in the relatively low doped regime, and a metallic-like behavior in the relatively high doped regime, which is qualitative agreement with experiments. Our results show that such unusual charge transport is closely related to a competition between the kinetic energy and the magnetic energy.